Collection Instructions

Specimen Collection: Urine, 24 Hour 

Container(s): Plastic 24-hour urine jug

Preferred Volume to Collect: 24 hour collection

Patient Prep:

• 5-HIAA collections require that the following restrictions apply for at least 48 hours prior to the collection period, and during the collection period: Do not eat avocadoes, bananas, eggplant, kiwi fruit, pineapple, plums, tomatoes, chocolate, or walnuts. Substances in these foods may interfere with this test. Do not take medications that contain guaifenesin or reserpine

Collection Instructions:

• Urine Preservative Guide (link) Addition of 50% acetic acid prior to start of collection is preferred but not required. Refrigeration during and after urine collection is an acceptable means of urine preservation. If adding preservative:
  • Add 25 mL 50% acetic acid at start of collection
  • Children under 5 years, add 15 mL 50% acetic acid
• 24 hour urine collection.
• Refrigerate during collection and transport
• Keep container upright at all times and check that lid is fastened evenly and securely.
• Detailed Instructions (link): Patient Collection Instructions
• Detailed Instructions (link): Urine Collection Guide for Staff